US Bridges

Alleghany Road over Silver Creek

Fair

Chautauqua County, New York · 0.9 MI SE of Smith Mills · Structure no. 000000003324770

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
324
2020 count
Owner
County
County Highway Agency

About this bridge

Alleghany Road over Silver Creek is a prestressed concrete box beam or girders - multiple carrying Alleghany Road over Silver Creek in Chautauqua County, New York. It was built in 1989, so it is 36 years old, younger than the New York average of 53 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 324 vehicles a day, roughly 6% of them trucks, projected to reach 454 by 2040. The structure is 36 ft (11 m) long and 32 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesAlleghany Road
CrossesSilver Creek
Location0.9 MI SE of Smith Mills
Coordinates42.49951, -79.09031
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic324 (2020)
Projected traffic454 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.2 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Alleghany Road over Silver Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Alleghany Road over Silver Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does Alleghany Road over Silver Creek carry?

About 324 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Alleghany Road over Silver Creek?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.3 m) and a deck 32 ft wide.

Who owns Alleghany Road over Silver Creek?

It is owned by the County Highway Agency.